图1. 柴达木盆地黑果枸杞7个叶绿体单倍型(H1-H7)的地理分布及其单倍型网络。图中居群编码与表1一致, 饼图表示各居群的单倍型频率。
A, 单倍型网络, 图中圆圈大小与单倍型频率成正比, 节点间的分支长度大致与单倍型的突变数成正比, 相应分支附近附有步长; 龙葵作为外类群。

Fig. 1. Geographical distribution and the haplotype network of seven chloroplast haplotypes (H1-H7) of Lycium ruthenicum in the Qaidam Basin. The population codes in this figure are consistent with Table 1. Pie graphs indicate the frequency of each haplotype at these locations.
A, In the median-joining haplotypes network, the sizes of the circles in the network are proportional to the haplotype frequencies. Branch lengths are roughly proportional to the number of mutation steps between haplotypes and nodes. The true number of steps is shown near the corresponding branch sections. Solanum nigrum was used as outgroup.